aboutsummaryrefslogtreecommitdiff
path: root/drivers/acpi/acpica/exoparg2.c
blob: d6fa0fce1fc91e74b197490b0f1f180d386b9545 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
/******************************************************************************
 *
 * Module Name: exoparg2 - AML execution - opcodes with 2 arguments
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2013, Intel Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#include <acpi/acpi.h>
#include "accommon.h"
#include "acparser.h"
#include "acinterp.h"
#include "acevents.h"
#include "amlcode.h"

#define _COMPONENT          ACPI_EXECUTER
ACPI_MODULE_NAME("exoparg2")

/*!
 * Naming convention for AML interpreter execution routines.
 *
 * The routines that begin execution of AML opcodes are named with a common
 * convention based upon the number of arguments, the number of target operands,
 * and whether or not a value is returned:
 *
 *      AcpiExOpcode_xA_yT_zR
 *
 * Where:
 *
 * xA - ARGUMENTS:    The number of arguments (input operands) that are
 *                    required for this opcode type (1 through 6 args).
 * yT - TARGETS:      The number of targets (output operands) that are required
 *                    for this opcode type (0, 1, or 2 targets).
 * zR - RETURN VALUE: Indicates whether this opcode type returns a value
 *                    as the function return (0 or 1).
 *
 * The AcpiExOpcode* functions are called via the Dispatcher component with
 * fully resolved operands.
!*/
/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_opcode_2A_0T_0R
 *
 * PARAMETERS:  walk_state          - Current walk state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Execute opcode with two arguments, no target, and no return
 *              value.
 *
 * ALLOCATION:  Deletes both operands
 *
 ******************************************************************************/
acpi_status acpi_ex_opcode_2A_0T_0R(struct acpi_walk_state *walk_state)
{
	union acpi_operand_object **operand = &walk_state->operands[0];
	struct acpi_namespace_node *node;
	u32 value;
	acpi_status status = AE_OK;

	ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_0T_0R,
				acpi_ps_get_opcode_name(walk_state->opcode));

	/* Examine the opcode */

	switch (walk_state->opcode) {
	case AML_NOTIFY_OP:	/* Notify (notify_object, notify_value) */

		/* The first operand is a namespace node */

		node = (struct acpi_namespace_node *)operand[0];

		/* Second value is the notify value */

		value = (u32) operand[1]->integer.value;

		/* Are notifies allowed on this object? */

		if (!acpi_ev_is_notify_object(node)) {
			ACPI_ERROR((AE_INFO,
				    "Unexpected notify object type [%s]",
				    acpi_ut_get_type_name(node->type)));

			status = AE_AML_OPERAND_TYPE;
			break;
		}

		/*
		 * Dispatch the notify to the appropriate handler
		 * NOTE: the request is queued for execution after this method
		 * completes. The notify handlers are NOT invoked synchronously
		 * from this thread -- because handlers may in turn run other
		 * control methods.
		 */
		status = acpi_ev_queue_notify_request(node, value);
		break;

	default:

		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
			    walk_state->opcode));
		status = AE_AML_BAD_OPCODE;
	}

	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_opcode_2A_2T_1R
 *
 * PARAMETERS:  walk_state          - Current walk state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Execute a dyadic operator (2 operands) with 2 output targets
 *              and one implicit return value.
 *
 ******************************************************************************/

acpi_status acpi_ex_opcode_2A_2T_1R(struct acpi_walk_state *walk_state)
{
	union acpi_operand_object **operand = &walk_state->operands[0];
	union acpi_operand_object *return_desc1 = NULL;
	union acpi_operand_object *return_desc2 = NULL;
	acpi_status status;

	ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_2T_1R,
				acpi_ps_get_opcode_name(walk_state->opcode));

	/* Execute the opcode */

	switch (walk_state->opcode) {
	case AML_DIVIDE_OP:

		/* Divide (Dividend, Divisor, remainder_result quotient_result) */

		return_desc1 =
		    acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
		if (!return_desc1) {
			status = AE_NO_MEMORY;
			goto cleanup;
		}

		return_desc2 =
		    acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
		if (!return_desc2) {
			status = AE_NO_MEMORY;
			goto cleanup;
		}

		/* Quotient to return_desc1, remainder to return_desc2 */

		status = acpi_ut_divide(operand[0]->integer.value,
					operand[1]->integer.value,
					&return_desc1->integer.value,
					&return_desc2->integer.value);
		if (ACPI_FAILURE(status)) {
			goto cleanup;
		}
		break;

	default:

		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
			    walk_state->opcode));
		status = AE_AML_BAD_OPCODE;
		goto cleanup;
	}

	/* Store the results to the target reference operands */

	status = acpi_ex_store(return_desc2, operand[2], walk_state);
	if (ACPI_FAILURE(status)) {
		goto cleanup;
	}

	status = acpi_ex_store(return_desc1, operand[3], walk_state);
	if (ACPI_FAILURE(status)) {
		goto cleanup;
	}

cleanup:
	/*
	 * Since the remainder is not returned indirectly, remove a reference to
	 * it. Only the quotient is returned indirectly.
	 */
	acpi_ut_remove_reference(return_desc2);

	if (ACPI_FAILURE(status)) {

		/* Delete the return object */

		acpi_ut_remove_reference(return_desc1);
	}

	/* Save return object (the remainder) on success */

	else {
		walk_state->result_obj = return_desc1;
	}

	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_opcode_2A_1T_1R
 *
 * PARAMETERS:  walk_state          - Current walk state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Execute opcode with two arguments, one target, and a return
 *              value.
 *
 ******************************************************************************/

acpi_status acpi_ex_opcode_2A_1T_1R(struct acpi_walk_state *walk_state)
{
	union acpi_operand_object **operand = &walk_state->operands[0];
	union acpi_operand_object *return_desc = NULL;
	u64 index;
	acpi_status status = AE_OK;
	acpi_size length = 0;

	ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_1T_1R,
				acpi_ps_get_opcode_name(walk_state->opcode));

	/* Execute the opcode */

	if (walk_state->op_info->flags & AML_MATH) {

		/* All simple math opcodes (add, etc.) */

		return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
		if (!return_desc) {
			status = AE_NO_MEMORY;
			goto cleanup;
		}

		return_desc->integer.value =
		    acpi_ex_do_math_op(walk_state->opcode,
				       operand[0]->integer.value,
				       operand[1]->integer.value);
		goto store_result_to_target;
	}

	switch (walk_state->opcode) {
	case AML_MOD_OP:	/* Mod (Dividend, Divisor, remainder_result (ACPI 2.0) */

		return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
		if (!return_desc) {
			status = AE_NO_MEMORY;
			goto cleanup;
		}

		/* return_desc will contain the remainder */

		status = acpi_ut_divide(operand[0]->integer.value,
					operand[1]->integer.value,
					NULL, &return_desc->integer.value);
		break;

	case AML_CONCAT_OP:	/* Concatenate (Data1, Data2, Result) */

		status = acpi_ex_do_concatenate(operand[0], operand[1],
						&return_desc, walk_state);
		break;

	case AML_TO_STRING_OP:	/* to_string (Buffer, Length, Result) (ACPI 2.0) */
		/*
		 * Input object is guaranteed to be a buffer at this point (it may have
		 * been converted.)  Copy the raw buffer data to a new object of
		 * type String.
		 */

		/*
		 * Get the length of the new string. It is the smallest of:
		 * 1) Length of the input buffer
		 * 2) Max length as specified in the to_string operator
		 * 3) Length of input buffer up to a zero byte (null terminator)
		 *
		 * NOTE: A length of zero is ok, and will create a zero-length, null
		 *       terminated string.
		 */
		while ((length < operand[0]->buffer.length) &&
		       (length < operand[1]->integer.value) &&
		       (operand[0]->buffer.pointer[length])) {
			length++;
		}

		/* Allocate a new string object */

		return_desc = acpi_ut_create_string_object(length);
		if (!return_desc) {
			status = AE_NO_MEMORY;
			goto cleanup;
		}

		/*
		 * Copy the raw buffer data with no transform.
		 * (NULL terminated already)
		 */
		ACPI_MEMCPY(return_desc->string.pointer,
			    operand[0]->buffer.pointer, length);
		break;

	case AML_CONCAT_RES_OP:

		/* concatenate_res_template (Buffer, Buffer, Result) (ACPI 2.0) */

		status = acpi_ex_concat_template(operand[0], operand[1],
						 &return_desc, walk_state);
		break;

	case AML_INDEX_OP:	/* Index (Source Index Result) */

		/* Create the internal return object */

		return_desc =
		    acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE);
		if (!return_desc) {
			status = AE_NO_MEMORY;
			goto cleanup;
		}

		/* Initialize the Index reference object */

		index = operand[1]->integer.value;
		return_desc->reference.value = (u32) index;
		return_desc->reference.class = ACPI_REFCLASS_INDEX;

		/*
		 * At this point, the Source operand is a String, Buffer, or Package.
		 * Verify that the index is within range.
		 */
		switch ((operand[0])->common.type) {
		case ACPI_TYPE_STRING:

			if (index >= operand[0]->string.length) {
				length = operand[0]->string.length;
				status = AE_AML_STRING_LIMIT;
			}

			return_desc->reference.target_type =
			    ACPI_TYPE_BUFFER_FIELD;
			break;

		case ACPI_TYPE_BUFFER:

			if (index >= operand[0]->buffer.length) {
				length = operand[0]->buffer.length;
				status = AE_AML_BUFFER_LIMIT;
			}

			return_desc->reference.target_type =
			    ACPI_TYPE_BUFFER_FIELD;
			break;

		case ACPI_TYPE_PACKAGE:

			if (index >= operand[0]->package.count) {
				length = operand[0]->package.count;
				status = AE_AML_PACKAGE_LIMIT;
			}

			return_desc->reference.target_type = ACPI_TYPE_PACKAGE;
			return_desc->reference.where =
			    &operand[0]->package.elements[index];
			break;

		default:

			status = AE_AML_INTERNAL;
			goto cleanup;
		}

		/* Failure means that the Index was beyond the end of the object */

		if (ACPI_FAILURE(status)) {
			ACPI_EXCEPTION((AE_INFO, status,
					"Index (0x%X%8.8X) is beyond end of object (length 0x%X)",
					ACPI_FORMAT_UINT64(index),
					(u32)length));
			goto cleanup;
		}

		/*
		 * Save the target object and add a reference to it for the life
		 * of the index
		 */
		return_desc->reference.object = operand[0];
		acpi_ut_add_reference(operand[0]);

		/* Store the reference to the Target */

		status = acpi_ex_store(return_desc, operand[2], walk_state);

		/* Return the reference */

		walk_state->result_obj = return_desc;
		goto cleanup;

	default:

		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
			    walk_state->opcode));
		status = AE_AML_BAD_OPCODE;
		break;
	}

store_result_to_target:

	if (ACPI_SUCCESS(status)) {
		/*
		 * Store the result of the operation (which is now in return_desc) into
		 * the Target descriptor.
		 */
		status = acpi_ex_store(return_desc, operand[2], walk_state);
		if (ACPI_FAILURE(status)) {
			goto cleanup;
		}

		if (!walk_state->result_obj) {
			walk_state->result_obj = return_desc;
		}
	}

cleanup:

	/* Delete return object on error */

	if (ACPI_FAILURE(status)) {
		acpi_ut_remove_reference(return_desc);
		walk_state->result_obj = NULL;
	}

	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_opcode_2A_0T_1R
 *
 * PARAMETERS:  walk_state          - Current walk state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Execute opcode with 2 arguments, no target, and a return value
 *
 ******************************************************************************/

acpi_status acpi_ex_opcode_2A_0T_1R(struct acpi_walk_state *walk_state)
{
	union acpi_operand_object **operand = &walk_state->operands[0];
	union acpi_operand_object *return_desc = NULL;
	acpi_status status = AE_OK;
	u8 logical_result = FALSE;

	ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_0T_1R,
				acpi_ps_get_opcode_name(walk_state->opcode));

	/* Create the internal return object */

	return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
	if (!return_desc) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}

	/* Execute the Opcode */

	if (walk_state->op_info->flags & AML_LOGICAL_NUMERIC) {

		/* logical_op (Operand0, Operand1) */

		status = acpi_ex_do_logical_numeric_op(walk_state->opcode,
						       operand[0]->integer.
						       value,
						       operand[1]->integer.
						       value, &logical_result);
		goto store_logical_result;
	} else if (walk_state->op_info->flags & AML_LOGICAL) {

		/* logical_op (Operand0, Operand1) */

		status = acpi_ex_do_logical_op(walk_state->opcode, operand[0],
					       operand[1], &logical_result);
		goto store_logical_result;
	}

	switch (walk_state->opcode) {
	case AML_ACQUIRE_OP:	/* Acquire (mutex_object, Timeout) */

		status =
		    acpi_ex_acquire_mutex(operand[1], operand[0], walk_state);
		if (status == AE_TIME) {
			logical_result = TRUE;	/* TRUE = Acquire timed out */
			status = AE_OK;
		}
		break;

	case AML_WAIT_OP:	/* Wait (event_object, Timeout) */

		status = acpi_ex_system_wait_event(operand[1], operand[0]);
		if (status == AE_TIME) {
			logical_result = TRUE;	/* TRUE, Wait timed out */
			status = AE_OK;
		}
		break;

	default:

		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
			    walk_state->opcode));
		status = AE_AML_BAD_OPCODE;
		goto cleanup;
	}

store_logical_result:
	/*
	 * Set return value to according to logical_result. logical TRUE (all ones)
	 * Default is FALSE (zero)
	 */
	if (logical_result) {
		return_desc->integer.value = ACPI_UINT64_MAX;
	}

cleanup:

	/* Delete return object on error */

	if (ACPI_FAILURE(status)) {
		acpi_ut_remove_reference(return_desc);
	}

	/* Save return object on success */

	else {
		walk_state->result_obj = return_desc;
	}

	return_ACPI_STATUS(status);
}